10. Kim Kardashian

Who hasn’t seen Kim Kardashian’s ass? Yes, they look like butt implants, but Ray J didn’t seem to mind.
9. Brittany Daniel

This Sweet Valley High twin has always been the hotter one for many,
but few people realize that she’s got one fine, and from the looks of
it, all-natural butt.
8. Evangeline Lilly

Who would’ve thought that someone as skinny as this Lost hottie would have enough flesh in her to fill her behind like that?
7. Charisma Carpenter

I’ve always considered Charisma one of the sexiest young actresses
today, and this pic of her showing off what Angel fans have been missing
proves this point.
6. Beyonce

She definitely showed us the true meaning of the word “bootylicious”.
5. Shakira

Her hips don’t lie. Same goes for her butt.
4. Jennifer Lopez

Had this list been made a decade ago, she would have been at the very
top. But with the emergence of firmer and definitely more luscious
butts in Hollywood, I had no choice but to put her at number four.
3. Jessica Alba

Currently the world’s sexiest woman according to FHM, Jessica Alba is
one of those very few skinny (by my standards at least) women blessed
with a behind that is far from being bony. In fact, she’s got one of the
best asses in the world, and here she is bending over to prove it.
2. Jessica Biel

Hands-down owner of the fittest body in Hollywood. Fittingly, she
also owns the fittest and firmest ass in show business. Justin
Timberlake is a lucky man.
1. Vida Guerra

This one’s a no-brainer. She’s already won FHM’s "Best Butt" Award twice, and I’m not about to dispute that. Judging by this pic from a King Magazine spread alone, Vida Guerra has the best celebrity ass in town, bar none.
Source: http://www.listaholic.com/the-ten-best-celebrity-asses.html